
/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 *版权所有2002-2018原作者。
 *
 *根据Apache许可证2.0版（“许可证”）获得许可；
 *除非符合许可证，否则不得使用此文件。
 *您可以在以下地址获取许可证副本：
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 *除非适用法律要求或书面同意，软件
 *根据许可证分发的内容是按“原样”分发的，
 *无任何明示或暗示的保证或条件。
 *有关管理权限和
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 */

package org.springframework.beans;

import org.springframework.lang.Nullable;

/**
 * Interface representing an object whose value set can be merged with
 * that of a parent object.
 *
 * @author Rob Harrop
 * @since 2.0
 * @see org.springframework.beans.factory.support.ManagedSet
 * @see org.springframework.beans.factory.support.ManagedList
 * @see org.springframework.beans.factory.support.ManagedMap
 * @see org.springframework.beans.factory.support.ManagedProperties
 */
/**
 *表示其值集可以与合并的对象的接口
 *父对象的名称。
 *
 *@作者Rob Harrop
 *@自2.0起
 *@参见org.springframework.beans.factory.support.ManagedSet
 *@参见org.springframework.beans.factory.support.ManagedList
 *@参见org.springframework.beans.factory.support.ManagedMap
 *@参见org.springframework.beans.factory.support.ManagedProperties
 */
public interface Mergeable {

	/**
	 * Is merging enabled for this particular instance?
	 */
	/**
	 *是否为此特定实例启用了合并？
	 */
	boolean isMergeEnabled();

	/**
	 * Merge the current value set with that of the supplied object.
	 * <p>The supplied object is considered the parent, and values in
	 * the callee's value set must override those of the supplied object.
	 * @param parent the object to merge with
	 * @return the result of the merge operation
	 * @throws IllegalArgumentException if the supplied parent is {@code null}
	 * @throws IllegalStateException if merging is not enabled for this instance
	 * (i.e. {@code mergeEnabled} equals {@code false}).
	 */
	/**
	 *将当前值集与提供的对象的值集合并。
	 *＜p＞提供的对象被视为父对象
	 *被调用者的值集必须覆盖所提供对象的值集。
	 *@param要合并的对象的父级
	 *@返回合并操作的结果
	 *如果提供的父级为｛@code null｝，则@throws IllegalArgumentException
	 *如果此实例未启用合并，@throws IllegalStateException
	 *（即｛@code mergeEnabled｝等于｛@codefalse｝）。
	 */
	Object merge(@Nullable Object parent);

}
